"My name is, or rather was, Eric summers." you said. "But I am not your Eric, I was pulled here through my and your dad's invention, a parallel portal."
Tonya gasped. She had heard that her dad was working on a gateway between worlds of different realities but she did not imagine he would succeed. "You are from a parallel world!?" she asked. "How did you get to be a girl?"
"One of my dad's other inventions got pulled in with me." you explained. "Some kind of gender bending dust, I really don't know what he works on in his lab. My sister, Tonya, usually keeps me at a safe distance away from the basement."
You then quickly explained how you came to be in your alternate sister's world, finishing by saying, "Your mom won't risk sending me back until I heal up a little from the trip here so she gave me the name of Sarah and asked me to wait while she stepped out to buy me some clothes."
Tonya smiled, giving you a warm hug. "In that case, welcome to our world, noble young traveler." she said, releasing you. "If you like, I can give you some pointers on how to be a girl."
"Thank you." you replied, blushing. "People always mistook me for a young girl back at home, I always wondered what I would look like as a girl but I didn't expect to find out like this."
Tonya giggled. "My brother wonders the same thing." she told you. "Only, like your sister, I keep him well away from the basement laboratory."
Just then, you heard your own voice calling out. "Sis, who are you talking to?"
You turned to find your alternate self only he too was different from you as he was a mere three feet tall, one foot shorter than you! Seeing him made you think of a baby girl which caused you to be more thankful for your life in your own world.
"Eric, this is Sarah." said Tonya, not wanting to freak our you or her little brother. "She will be living here, with us, for a short while."
Eric gave you a strange look then shrugged his tiny shoulders. "Okay, whatever." he said. "It's time for my meds, Tonya, can you help me get them?"
"Sure, bro." replied Tonya. "Go wait for me in the kitchen, alright?"
Eric nodded, then walked off, towards the kitchen. You watched him leave, then turned to Tonya. "Meds?" you asked.
Tonya nodded. "Growth hormones." she replied. "We are hoping it will help spark a growth spurt, making him taller and better able to fend for himself."
"I see." you replied, imaging how hard it must be for him. "Here I thought I had it rough, being four feet tall."
"It's a how you look at it." replied Tonya. she grabbed a brush. "Now then, let's see what we can do about this hair..."